Underdrain structure for media filters
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United States of America Patent
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-
Nov 2, 1999
Grant Date -
N/A
app pub date -
Jul 7, 1997
filing date -
Jul 7, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An underdrain for a media filter used to filter liquids. The media particles rest on a pair of perforated plates having offset perforations. The plates are spaced apart a distance less than the size of the media particles. This allows the filtered liquid to flow through the plates but blocks passage of the media particles through the plates.
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